How to make the true pyramid model (using Pi and Pythagoras equation)

Pyramid model, same proportions as Giza pyramid in Egypt. We used number Pi (3.14) and Pythagorean equation to calculate the model size. This was for the middle school project.
The base of the Great Pyramid of Giza is a square and it is equal to the circumference of a circle with a radius equal to the height of the Great Pyramid of Giza.
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